KR100659568B1 - Fin for heat exchanger - Google Patents

Abstract

The present invention relates to a fin for a heat exchanger, and to provide a fin consisting of a single part, the object of the present invention is to improve the assemblability of the heat exchanger, to reduce the number of parts and to improve the performance and durability of the heat exchanger.

The heat exchanger fin 1 according to the present invention is formed of a porous single block form in which a plurality of vent holes 11 are formed by foaming an aluminum material as a whole, and a plurality of tube insertion holes 13 are formed along a longitudinal direction. It is done. The tube insertion hole 13 may have a slotted, circular or elliptical cross section, may be arranged in one or two rows, and the circular or elliptical tube insertion holes 13 may be mixed and arranged in a zigzag shape. In addition, the heat exchanger using the same, the fin (1); A plurality of tubes (2) protruding through and inserted into the tube insertion holes (13) of the pin; In addition, at least one header pipe having a portion 21 protruding to the outside of the tube insertion holes so as to communicate with the tubes is inserted and connected to the refrigerant inlet pipe 35 and the refrigerant discharge pipe 37 at a predetermined position ( 3) is made, including.

Heat exchanger, heat radiating fin, heat exchange fin, aluminum fin

Description

Heat exchanger fin {FIN FOR HEAT EXCHANGER}

1 is a perspective view showing a fin for a heat exchanger according to Embodiment 1 of the present invention.

2 is a plan view of the same.

Figure 3 is a schematic longitudinal cross-sectional view showing a heat exchanger using a heat exchanger fin according to the first embodiment of the present invention.

4 is a plan view showing a heat exchanger fin according to a second embodiment of the present invention.

Figure 5 is a schematic longitudinal cross-sectional view showing a heat exchanger using a heat exchanger fin according to a second embodiment of the present invention.

6 is a plan view illustrating a fin for a heat exchanger according to Embodiment 3 of the present invention.

7 is a plan view illustrating a fin for a heat exchanger according to Embodiment 4 of the present invention.

8 is a plan view showing a heat exchanger fin according to a fifth embodiment of the present invention.

9 is a plan view of the heat exchanger fin according to the sixth embodiment of the present invention.

10 is a plan view showing a heat exchanger fin according to a seventh embodiment of the present invention.

11 is a perspective view illustrating a fin for a heat exchanger according to Embodiment 8 of the present invention.

12 is a schematic longitudinal cross-sectional view showing a heat exchanger using a heat exchanger fin according to Embodiment 8 of the present invention.

13 is a schematic front view showing a conventional heat exchanger.

<Explanation of symbols for main parts of the drawings>

1, 1a: pin, 2: tube,

3: header pipe, 11, 11a: ventilator,

13: tube insertion hole, 21: protrusion,

31: header, 33: tank,

T: thickness of the pin, t1, t2, t3, t4, t5: spacing

The present invention relates to a fin for a heat exchanger, and in particular, by forming an aluminum material to form an insertion hole into which a refrigerant flow tube is inserted, thereby excellent in assembling performance of the heat exchanger, reducing the number of parts, and durability of the heat exchanger. It relates to a heat exchanger fin that can be improved.

For example, a heat exchanger used in an automobile air conditioner or the like is configured to effectively exchange heat between a heat exchange medium (refrigerant or cooling water; hereinafter referred to as a "refrigerant") circulating in the flow path of the air conditioner and the outside air. The condenser core and the evaporator core which comprise a cooling system, and the heater core which comprise a heating system according to the use purpose are mentioned, In addition, the radiator core etc. which comprise an automobile cooling apparatus are mentioned.

These heat exchangers can be classified into a large fin and tube type in which a plurality of holes are drilled in an aluminum plate, and a refrigerant flow pipe of a circular cross section is pressed into the holes, and a plurality of flat aluminum refrigerant flow pipes are arranged in a line. The laminate can be divided into a laminate type (Laminate Type) interposed therebetween, and a porous refrigerant flow tube in an S-shape, and a serpentine type (Serpentine Type) having a pin inserted therebetween. This type of heat exchanger can be configured in various forms depending on the type of the refrigerant flow path, but the function of the heat transfer fins is about the same, so the laminate type heat exchanger, which is the type most used at present, will be described.

As shown in FIG. 13, the conventional heat exchanger covers the header 51 in a state in which a plurality of through holes (not shown) are generally formed along a length direction and spaced apart from the header 51 at a predetermined interval. By having a tank 53 coupled to each other, the upper and lower parts (such as an evaporator core may be installed only at one of the upper and lower parts, which form a passage of a refrigerant therein, but for convenience, only the one installed at both the upper and lower parts will be described. Header pipes 5 and 5; And a plurality of tubes (6) communicating with the inner passages of the two header pipes (5, 5) by coupling both ends to corresponding through holes of the two header pipes (5, 5); It comprises a plurality of fins (7) installed between the tubes (6). In addition, the coolant inlet pipe 55 and the coolant discharge pipe 57 are sequentially installed at arbitrary positions of the two header pipes 5 and 5. Since the brazing method is used when joining and laminating the tubes 6 and the fins 7, the tubes 6 and the fins 7 are formed by blanking the clad aluminum sheet.

However, in the case of the conventional fin (7), especially corgate fins, because the zigzag bending process and the louver forming process to increase the heat exchange area is required, it takes not only a lot of manufacturing time but also manufacturing one heat exchanger. Because of the large quantity, not only the productivity of the heat exchanger is lowered, but also the cost is increased. In addition, since the number of the fins 7 is large, it takes a long time to stack the tube 6 and the fins 7 by brazing, and the strength of the fins 7 as well as the fins 7 is weak. Distortion of the tubes 6 and the fins 7 occurs in the lamination process. In addition, since the tubes 6 and the fins 7 may be damaged even after they are stacked, the steel side support 8 is laminated on the outermost sides of the tubes 6 and the fins 7 in the lamination process. To reinforce the tubes 6 and the fins 7. Therefore, the number of parts and the number of assembly parts of the heat exchanger are further increased, and the side support 7 and the header pipe 5 are different because the thermal expansion rate of the tube 6 made of aluminum is different from that of the side support 7 made of steel. If it is not correctly bonded, a length difference due to thermal expansion occurs, the tube 6 is torn and damaged, and the refrigerant may leak through the damaged portion of the tube 6. In addition, since the strength of the tube 6 and the fin 7 is weak, the installation positions of various components supported on the heat exchanger, such as a receiver dryer, are limited, which places a lot of restrictions in installing a heat exchanger in an automobile. In addition, when a refrigerant that requires high pressure as an alternative refrigerant, such as carbon dioxide, is applied, a conventional heat exchanger has a weak strength, which makes it difficult to apply an alternative refrigerant.

 The present invention has been made in view of the above-described conventional problems, by providing a fin consisting of a single part to improve the assemblability of the heat exchanger, reduce the number of parts, to improve the performance and durability of the heat exchanger It aims to do it.

Another object of the present invention is to be able to support various parts supported on the heat exchanger at any position of the heat exchanger, such as for example, receiver deere.

Another object of the present invention is to be able to apply an alternative refrigerant that requires high pressure.

In order to achieve the above object, the heat exchanger fin according to the present invention is in the form of a porous block fin, formed of a single block in which a plurality of air holes are formed by foaming an aluminum material as a whole, inserting a plurality of tubes along the longitudinal direction A ball is formed.

According to the present invention, the tube insertion hole may have a slotted cross section. In addition, the tube insertion hole may be formed in a plurality of rows, for example, two rows along the longitudinal direction. In the case of having two tube insertion holes, they may be formed in parallel with each other, and may be formed in a zigzag form. In addition, when two tube insertion holes are present, the tube insertion holes constituting each row may have a circular cross section or an elliptical cross section, and the tube insertion holes having a circular cross section and the tube insertion holes having an elliptical cross section may be mixed in an appropriate position. Can be.

delete

According to the heat exchanger fin and the heat exchanger using the same according to the present invention configured as described above, since the fin is composed of a single component in the form of a porous block, the fin does not need to be processed separately, and there is no need for clad surface treatment, After inserting them into the tube, the header pipe is joined to the brazing process so that the heat exchanger can be assembled well, the assembly parts are reduced, and there is no need to reinforce the conventional side support on both sides of the fin. It is also possible to apply alternative refrigerants that require high pressure.

Other features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments based on the accompanying drawings.

<Example 1>

1 and 2, the fin for the heat exchanger according to the first embodiment of the present invention will be described, and the heat exchanger using the fin according to the first embodiment will be described with reference to FIG.

First, as shown in Figures 1 and 2, reference numeral 1 denotes a fin for a heat exchanger according to the first embodiment, consisting of a single block of a substantially rectangular parallelepiped, it is preferable to form a substantially rectangular parallelepiped like this, but a single block If it is forming, the shape is arbitrary besides the cuboid.

The fin 1 is preferably a porous body in which a plurality of vent holes 11 are uniformly formed as a result of foaming an aluminum material. The vent hole 11 serves as an air passage for heat exchange. In the fin 1, a plurality of tube insertion holes 13 penetrating up and down along the longitudinal direction are formed in one row at predetermined intervals. The tube insertion hole 13 is preferably formed together when the aluminum material is foamed to form a block-like porous body. In terms of production technology, by forming a block porous body by foaming it much larger than the size of a general heat exchanger, and cutting it to an appropriate size according to the capacity of the heat exchanger, several fins (1) can be obtained. Even if done, it can be cut easily.

According to the first embodiment, the tube insertion hole 13 preferably has a slotted cross section so that the plate-shaped tube can be inserted.

The thickness T (see FIG. 2) of the fin 1 is preferably 15 to 17 mm for a heater core, for example, and 14 to 16 mm for a radiator. However, the heat exchange efficiency considering the degree of distribution of the vent holes 11 is preferable. It can be measured and made into a more compact form.

Next, the heat exchanger using the fin 1 comprised as mentioned above is demonstrated.

As shown in FIG. 3, plate-shaped tubes 2 are inserted into the tube insertion holes 13 of the pin 1. The plate-shaped tube 2 is made of aluminum clad material for brazing bonding with the fin 1. Since the whole plate-shaped tube 2 inserted in the pin 1 is reinforced by the pin 1, you may consist of aluminum clad material of comparatively thin thickness compared with the conventional. In the case of an evaporator plate, it is preferred to have a thickness of less than 0.4 mm, and in the case of a heater or a writer plate, it is preferably made of less than 0.3 mm.

The tube 2 is inserted such that both ends thereof protrude out of the tube insertion hole 13. The protruding portion 21 of the tube 2 protruding out of the tube insertion hole 13 is enlarged by an expansion process in order to prevent detachment and to improve contact between the tube 2 and the fin 1. Can have The header pipe 3 consisting of the header 31 and the tank 33 is coupled to the protrusion 21 of the tube 2. The protrusion 21 of the tube 2 is inserted into the header pipe 3 so that the inside of the tube 2 and the inside of the header pipe 3 communicate.

On the other hand, in the case of a commonly used plate-shaped tube 2 having a pair of tanks installed at one end or both ends, such as a tube for an evaporator core, the tanks 33 are sequentially stacked to function as a header pipe 3. Therefore, it is not necessary to install a separate header pipe (3). A heat exchanger that has only one header pipe (3) installed at the top or bottom in correspondence with a migraine tube having a pair of tanks at one end and a double head tube having a pair of tanks at both ends, such as a tube used for an evaporator core. There may be a heat exchanger in which both header pipes 3 are installed on the roof tile, and in the case of the heat exchanger in which one header pipe 3 is installed, one end is blocked and the other end is opened so that the open portion is the header pipe. In the case of a heat exchanger in which two header pipes 3 are installed, a tube of a type in which the two ends are opened and each of the openings are in turn coupled to the two header pipes 3 is used. It is preferred to be used. When only one header pipe 3 is used, the refrigerant inlet pipe 35 and the refrigerant discharge pipe 37 are connected together in a predetermined position to one header pipe 3, and when the two header pipes 3 are used, The refrigerant inlet pipe 35 and the refrigerant discharge pipe 37 may be connected to a predetermined position together in one header pipe 3 or separately in the two header pipes 3, respectively.

As described above, after the assembly of the fins 1, the tubes 2 and the at least one header pipe 3 is completed, the heat exchanger according to the invention is completed by joining them by brazing.

Next, the operation of the heat exchanger fin according to the first embodiment configured as described above and the heat exchanger using the same will be described.

Since the fin according to the first embodiment is composed of a single part in the form of a porous block, not only the fin 1 is required to be processed separately, but also no clad surface treatment is required. In order to manufacture the heat exchanger using the fin according to the first embodiment, the plate-shaped tubes 2 are inserted into the slotted tube insertion holes 13 of the fin 1 and then protruded out of the tube insertion hole 13. Since the header pipe 3 is coupled to the tube protrusion 21 to perform the brazing process, the assembly of the heat exchanger is easy and the assembly time is reduced. In addition, the number of assembly parts is reduced since the pins 1 can perform their functions without using a plurality of pins and side supports separated as in the prior art. In addition, since the fins 1 are formed in a single block to reinforce the tubes 2, the tubes 2 are not damaged during the heat exchanger assembly or use, so that the heat exchanger can be safely used and a relatively high pressure such as carbon dioxide is required. Robust enough to apply the refrigerant. In addition, since the pin 1 surrounds the tubes 2 in the form of a block, it is possible to support parts such as a receiver dryer at a suitable position around the pin 1. In addition, since the tubes 2 are inserted into the fins 1 of the porous block shape, and the entire area of the tubes 2 is in contact with the fins 1, the heat transfer areas of the tubes 2 and the fins 1 are increased to transfer heat. Performance is improved.

<Example 2>

The heat exchanger fin according to the second embodiment of the present invention will be described with reference to FIG. 4, and the heat exchanger using the heat exchanger fin according to the second embodiment will be described with reference to FIG. 5. In the heat exchanger fin according to the second embodiment, circular tube inserting holes 13 are formed in place of the slotted tube inserting holes in the fin of the first embodiment, and the circular tube inserting holes 13 correspond to each other in two rows. Except that formed side by side, the rest of the configuration and operation is the same as the above-described embodiment 1, the detailed description thereof is omitted here.

As shown in FIG. 5, the tube insertion hole 13 of the pin 1 configured as described above is inserted through the pipe-shaped tube 2, and the portion 21 protrudes out of the tube insertion hole 13. The heat exchanger can be completed by brazing by joining the head pipes 3. In this case, the tube 2 is inserted into the tube insertion hole 13 in order to prevent the tube 2 from being separated and to improve the contact between the tube 2 and the pin 1. The protrusion 21 of can be expanded, and this protrusion 21 is inserted into the header pipe 3 and joined.

<Example 3>

A heat exchanger fin according to Embodiment 3 of the present invention will be described with reference to FIG. 6. The fin for the heat exchanger according to the third embodiment has the rest of the configuration except that the elliptical tube insertion holes 13 are formed in parallel with each other in two rows instead of the circular tube insertion holes in the fin of the second embodiment. And the operation and the assembling structure of the heat exchanger using the heat exchanger fin according to the third embodiment are the same as those of the second embodiment described above, and thus the detailed description thereof will be omitted.

The elliptical tube insertion holes 13 are more advantageous in terms of heat exchanging performance so that the long diameter portion is formed obliquely back and forth.

<Example 4>

The heat exchanger fin according to the fourth embodiment of the present invention will be described with reference to FIG. 7. The heat exchanger fin according to the fourth embodiment is a circular tube insertion hole 13 and the elliptical tube insertion hole 13 in the fins of Embodiments 2 and 3 described above are mixed and properly arranged at a predetermined position. 7 and the rest of the configuration and operation, except that it is arranged in a row (for convenience, an elliptical tube insertion hole is arranged in the front row, a circular tube insertion hole is arranged in the rear row for convenience). Since the assembling structure of the heat exchanger using the heat exchanger fin is the same as that of the second and third embodiments, detailed description thereof will be omitted here.

Example 5

The heat exchanger fin according to the fifth embodiment of the present invention will be described with reference to FIG. 8. Fin for the heat exchanger according to the fifth embodiment is for the heat exchanger according to the fifth embodiment and the rest of the configuration and operation, except that the circular tube insertion holes 13 in the above-described second embodiment is arranged in two rows in a zigzag form Since the assembling structure of the heat exchanger using the fin is the same as in the second to fourth embodiments described above, its detailed description is omitted here.

In the heat exchanger fin of the fifth embodiment, the circular tube inserting holes 13 are arranged in two rows in a zigzag form, so that the circular tube inserting holes 13 located at one end of the first row are opposite to the second row of the second row. Circular tube insertion hole 13 located at the end is located close to the short side of the fin (1) and the spacing (t1) is preferably 3-7mm, but can be changed according to the specifications of the heat exchanger. In addition, the interval t2 between the front end of the first row and the rear end of the second row is preferably fixed to about 3 to 7 mm. In addition, the distance t3 between the first row and the long side (front side) of the pin 1 close thereto, and the long side (long side of the back side) of the second row and the pin 1 close thereto and It is preferable that the space | interval t4 between is also fixed about 3-7 mm. In addition, the interval t5 between the circular tube insertion holes 13 constituting each row and the interval t6 between adjacent circular tube insertion holes 13 in the first row and the second row are also about 3 to 7 mm. It is preferable to be fixed. The first and second rows of circular tube insertion holes 13 form the above arrangement so that any three circular tube insertion holes 13 adjacent to each other in the first and second rows are arranged in an approximately equilateral triangle. The air flowing through the vents 11 may evenly flow through the fins 1 to increase heat exchange performance.

<Example 6>

The heat exchanger fin according to the sixth embodiment of the present invention will be described with reference to FIG. 9. Fin for the heat exchanger according to the sixth embodiment is the heat exchanger according to the sixth embodiment and the rest of the configuration and operation, except that the elliptical tube insertion holes 13 in the above-described embodiment 3 are arranged in two rows in a zigzag form Since the assembling structure of the heat exchanger using the fin is the same as in the second to fourth embodiments described above, its detailed description is omitted here.

<Example 7>

The heat exchanger fin according to the seventh embodiment of the present invention will be described with reference to FIG. 10. The heat exchanger fins according to the seventh embodiment are arranged in two rows in a zigzag form at a predetermined position in a state where the circular tube insertion holes 13 and the elliptical tube insertion holes 13 in the above-described embodiments 5 and 6 are mixed. Example 7 shows the rest of the configuration and operation, except that the arrangement (Fig. 9, for convenience, the elliptical tube insertion hole 13 is arranged in the front row and the circular tube insertion holes are arranged in a zigzag shape in the rear row). The assembling structure of the heat exchanger using the fin for the heat exchanger is the same as in the above-described fifth embodiment and sixth embodiment, and a detailed description thereof will be omitted.

<Example 8>

The heat exchanger using the fin according to the eighth embodiment will be described with reference to FIG. 11 and the heat exchanger fin according to the eighth embodiment of the present invention.

The fin 1a for the heat exchanger according to the eighth embodiment is formed in the form of a single block having a substantially rectangular parallelepiped shape, which is the same as the above-described embodiments, but the tube insertion holes 13 are formed as in the aforementioned embodiments. It is different from the above-described embodiments in that the vent holes 11a are formed uniformly and are interposed between the tubes 2 as a conventional structure to form a heat exchanger.

That is, the heat exchanger using the fin (1a) according to the eighth embodiment, a plurality of porous block fin (1a) and a plurality of tubes (2) which are sequentially laminated and bonded; It comprises at least one header pipe (3) is inserted into the end of the tube (2) is joined and connected to the refrigerant inlet pipe and the refrigerant discharge pipe in a predetermined position.

The effects of the heat exchanger fin and the heat exchanger using the same according to the present invention configured as described above are as follows.

First, since the fin according to the present invention is composed of a single part in the form of a porous block, the fin 1 does not need to be processed separately, but also the cladding part, that is, the tube insertion hole 13, that is brazed to the tube 2 separately. Since there is no need for surface treatment, cheap materials can be used, thus saving costs.

Second, when manufacturing a heat exchanger using a fin according to the present invention inserts the tubes (2) in the tube insertion holes 13 of the fin (1) and then of the tube (2) protruding out of the tube insertion hole (13) Since the brazing treatment is performed by coupling the header pipe 3 to the protrusion 21, not only the assembly of the heat exchanger is easy, but also the assembly process and assembly time are reduced, thereby improving productivity.                     

Third, since the pin according to the present invention is formed in a single block form, it is not necessary to use a plurality of pins and side supports, thereby reducing the number of assembly parts and further reducing the cost.

Fourth, since the fins 1 are formed in a single block to reinforce the tubes 2, the tubes 2 are not damaged during the assembling or use of the heat exchanger. Thus, the durability is improved and the heat exchanger can be safely used. It can be applied to various heat exchangers because it is strong enough to apply the alternative refrigerant requiring high pressure.

Fifth, since the fin 1 encloses the tubes in the form of a block, it is possible to easily support components such as a receiver dryer at a suitable position around the fin 1, thereby making it easier to secure space for installing the heat exchanger in the vehicle and to exchange heat. Excellent wearability of the machine.

Sixth, since the tubes 2 are inserted into the fins 1 of the porous block shape, and the entire area of the tubes 2 is in contact with the fins 1, the heat transfer areas of the tubes 2 and the fins 1 are increased, thereby exchanging heat. Performance is improved.

Claims (8)

It is made of a porous single block form in which a plurality of vent holes 11 are formed by foaming an aluminum material, and a plurality of tube insertion holes 13 are formed along the longitudinal direction; The tube insertion holes (13) have a circular cross section or an elliptical cross section and are formed while they are arranged in a zigzag arrangement in a plurality of rows along the longitudinal direction; The row of tube inserting holes (13) is in two rows, and is located at one end of the second row of circular tube inserting holes (13) located at one end of the first row of the two rows of tube inserting holes (13). Circular tube insertion hole 13 is located near the short side of the fin (1), the spacing fins, characterized in that the interval is in the range of 3 ~ 7mm. Fin according to claim 1, characterized in that the tube insertion hole (13) has a slotted cross section. The fin for heat exchanger according to claim 1, wherein the tube inserting holes (13) have a circular cross section or an elliptical cross section and they are formed parallel to each other in two rows along the longitudinal direction. delete delete It is made of a porous single block form in which a plurality of vent holes 11 are formed by foaming an aluminum material, and a plurality of tube insertion holes 13 are formed along the longitudinal direction; The tube insertion holes (13) have a circular cross section or an elliptical cross section and are formed while they are arranged in a zigzag arrangement in a plurality of rows along the longitudinal direction; The tube insertion hole 13 has two rows, and the distance between the front end of the first row and the rear end of the second row of the tube insertion holes 13 of the two rows is fixed to about 3 to 7 mm, and the first row and the The distance between the long side of the close pin 1 and the distance between the second row and the long side of the close pin 1 are also fixed to about 3 to 7 mm, and the tube insertion holes constituting each row are fixed. The spacing between the (13) and the spacing between the neighboring circular tube insertion holes (13) in the first row and the second row is also fixed to about 3 to 7mm, characterized in that the fin for the heat exchanger. delete delete

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